The optimal number of shades in an eyeshadow palette depends on various factors, including the target audience, the intended use of the palette, and market trends. However, there are some general guidelines that can help in determining the best number of shades for a custom eyeshadow palette:

1. Beginner-Friendly Palettes

• 5-6 Shades: A smaller palette with 5-6 shades is ideal for beginners or those who prefer a simple, everyday makeup routine. This size is manageable, offers enough variety for basic looks, and is typically more affordable.

2. Everyday Use Palettes

• 8-12 Shades: Palettes in this range provide a good balance between variety and usability. They can offer a mix of neutral and accent colors, allowing for both day and night looks. This is a popular size for many consumers who want versatility without being overwhelmed.

3. Professional and Versatile Palettes

• 12-18 Shades: For makeup enthusiasts and professionals, a palette with 12-18 shades offers a wide range of colors and finishes (matte, shimmer, metallic, etc.). This allows for more creative and complex looks and caters to a broader spectrum of skin tones and preferences.

4. Comprehensive and Artistic Palettes

• 20+ Shades: Larger palettes with 20 or more shades are suitable for those who love experimenting with makeup and creating a variety of looks. These palettes often include a mix of bold, neutral, and transition shades, as well as different textures. They are typically favored by makeup artists and serious beauty enthusiasts.

Factors to Consider

1. Target Audience: Understand who your customers are. Beginners and casual users might prefer smaller palettes, while enthusiasts and professionals may seek larger ones.
2. Portability: Smaller palettes are more travel-friendly and convenient for on-the-go use, while larger palettes are better for at-home use.
3. Versatility: Ensure that the shades included can create cohesive looks. Even in larger palettes, having a balance of light, medium, and dark shades, as well as a mix of finishes, is crucial.
4. Trends: Stay updated with market trends. Sometimes, trends favor minimalism with smaller palettes, while at other times, maximalism with larger, more comprehensive palettes is in vogue.
5. Price Point: Larger palettes tend to be more expensive, which might limit your audience. Smaller, affordable palettes can appeal to a wider range of consumers.
6. Customization: Offering customizable palettes where consumers can choose their own shades can cater to both minimalists and maximalists.

By considering these factors and understanding your target audience’s preferences, you can determine the optimal number of shades for your custom eyeshadow palette.There are many reference inspirations for eyeshadow palette layouts on Pinterest. You can look at these eyeshadow palettes and then refer to and imitate them according to your actual situation.